Improvement in seal-locks



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Seal-Locks.

Patented June 9,1874.

No.15h748.A

WITNESSES INVENTQR; /J

y 3Sheet-s-Shet3. P. w. saluons. Saal-'Locks NQ. 151,748I

wnNEss'Es INvEVNTon 4 f wie@ Hamel/S UNITED STATES PATENT OFFICEFRANKLIN-VV. BROOKS, OF NEW YORK, N. Y.

IMPROVEMENT IN SEAL-LOCKS.

Specilication formingpart of Letters Patent No. 151,748, dated June 9,1874; application filed December 23, 1873.

OASE F.

To all whom t may concern.'

Beit known that I, FRANKLIN W. BRooKs, of the city, county, and State ofNew York, have invented an Improvement in Seal-Locks, of which thefollowing is a specification:

My invention consists, first, in constructing a lock, as hereinafterdescribed, to adapt it for the combined use of a paper and a glass seal.My invention further consists in lining the more vulnerable parts of thelock-case with steel or case-hardened iron to prevent access to themechanism by drilling.

In the accompanying drawings, Figure 1 is a front view of the internalmechanism of a lock illustrating my invention, and shown in its unlockedcondition. Fig. 2 is a view of the same parts locked. Fig. 3 is avertical section on the line 3 3, Fig. 1. Fig. 4 is a vertical sectionon the line 4 4, Fig. 2. Fig. 5 is a horizontal section on the line 5 5,Fig. 2. Fig. 6 is a front view of the bolts and the retaining dog,omitting the tumblers. Fig. 7 is a front view of the complete lockclosed, but

omitting the seal. Fig. 8 is a perspective view of the same open. Fig. 9is an end view thereof, partly in section, showing the seal in positionin the closed lock. Fig. 10 is a perspective view, showing thelock-shackle closed and the hinged seal-holding cap unfastened. Fig. 11is a similar view, showing the hasp of the seaLholding cap in anotherposition. Fig.

12 is a perspective view of the same with the hinged cap detached andthe paper-seal in position. Fig. 13 is a front View of the lock shown inFigs. 11 and 12. Fig. 14 is a section on the line 14, 14, Fig. 13. Fig.15 is a section on the line 15, 15, Fig. 13.

The lockcase A is preferably cast in a single piece of metal, or, ifmade in more than one piece, they are connected without any exposedfastenings. The stationary face-plateay B is secured by rivets. O, whichare concealed by the seal-holder when the lock is closed. The

mechanism which secures the shackle D may be constructed iu any usual orsuitable manner. For the purpose of illustration I have shown a commonpivoted or sliding bolt, E, driven forward by a spring, F, and engaging,by its lug, e, with notch d. G represents spring-tumblers, and g a stumpon the bolt engaging therewith. K is the key by which the tumblers areadjusted and the bolt re` tracted. I represents a seal-holder adaptedfor the reception of a Brooks glass seal, and hinged, at i, to thefaceplate B by a pin', the ends of which are concealed and protected bythe projecting flanges or edges of the lockcase A, as represented inFigs. 8 and 11. It will hence be understood that .the seal-holder ispivoted to the face-plate before the latter is secured in the lock, andthat when so secured the pintle cannot possibly be removed withoutpermanent breakage of the-parts. The free end of the sealholder isprovided with a staple, J, which receives the end of the shackle D, asshown in Figs. 11, 14, and 15, so as to be held directly thereby. Ifpreferred, said staple may be placed in vertical position, as shown inFigs. 2, 4, 8, and 10, so as to receive and be held by a fork of thebolt, which engages with the shackle. The sealseat is formed in front ofthe seal-holder with a ledge at the bottom and overlapping flanges j atthe ends, as more particularly illustrated in Figs. 8, 9, 10, and 1l, sothat a seal, S, of glass 0r other proper material, and of the requiredsize, may be slipped in from the top, and will rest within its seat.When the seal-holder is shut its top is covered by a permanent ledge, L,projecting from the face-plate of the lock, so that when 'theseal-holder is fastened, as already described, the removal of the sealin whole condition is rendere-d impossible. The seal thus securedcompletely masks the keyhole H, and thus prevents access to the intel\\rior of the lock until the seal is broken. The ledge L also forms awater-shed, to prevent the entrance into the lock of water from rain orsnow. On the front of the face-plate B is a sliding guard-plate, M,which, when moved in one direction, masks the key-hole H, and when movedin the other direction exposes it. The guard plate, by covering thekey-hole, prevents the entrance of fragments of glass within the lock.As an additional security, or to afford a second authority means ofsealing the lock, it is adapted for the reception of a paper seal, S2,Figs. 3, 5, 12, 14, and 15, placed beneath the hinged seal-holder I, andsecured by spines or points N projecting from the faceplate B intoapertures n in the cap I and perforating the paper seal between them.'Ihe openings n extend completely through the cap I, and are ofsufficient size to expose the points N clearly to View, so that it maybe seen at all times, Whether they are in effective condition or not. Orepresents a hook projecting from the seal holder and entering a hole,o, inthe face-plate, to constitute an additional means of securing thehinged end of the holder.

From the foregoing description it will be apparent that the seal-holderis secured without an automatic spring-catch, and, further, that if, byaccident or design, the lock-shackle D is closed Without shutting theseal-holder, so that it will be permanently locked, the omission will beclearly manifest even at a long distance, because the seal-holder cannotthen be closed intoits place. l? represents a casc-

